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MATERIAL:
  • Sleeve: Cres per AMS 5639 (304) or AMS 5514 (305).
  • Bracket: Cres per AMS 5528 (17-7), heat treat to 180 Ksi minimum ultimate tensile strength.
  • Nut: Cres per AMS 5525. 5737 (A-286), heat treat to 160 Ksi minimum ultimate'tensile strength.
FINISH:
  • Sleeve, Bracket & Nut: Passivate per QQ-P-35.
  • Nut: Dri-Film Lubricant per MIL-L-46010.
  • Sleeve: Red dyed
Unit of Measure

Nut Type

 N/A Locking

Thread Size

 N/A 0.2500-20 UNJC-3B
Lead1 N/A Single

Ø M Max.

 N/A 0.335 Inch
Ø Q +.004/-.001 - Soft2 N/A 0.354 Inch
Ø Q +.004/-.001 - Hard3 N/A 0.363 Inch

Ø R1 +.020/-.000

 N/A 0.515 Inch

Ø R2 ±.005

 N/A 0.437 Inch

Ø U

 N/A 0.310 Inch

W

 N/A 0.450 Inch

X

 N/A 0.650 Inch

Ø Z

 N/A 0.379 Inch

G1

 N/A 0.219 - 0.250 Inch

G2

 N/A 0.259 - 0.289 Inch

K

 N/A 0.285 Inch

L - Nut Height

 N/A 0.089 Inch

Y - Thread Relief

 N/A 0.303 Inch
Weight4 N/A 0.682 lb/100

Thread Type

 N/A Unified

N/A A minimum of two threads are deformed to produce self-locking action per NASM25027 when locking feature is required.

N/A

  • Nut element has .060 total radial float for Grip lengths "AA" thru "C" and .046 minimum for Grip lengths greater than "C".
  • For nut element replacement Part Number, see drawing S-0877.
  • Nut element removal tool available, Part Number RB 6527.
  • For high volume installation rates, alternative power tooling is available:
    Pneumatic "C" Yoke Part Numbers: PTF7503-( ) and PTE7503-( ) (drawing S-1086).
    Air-Hydraulic Gun Part Numbers: DT128O-( ) (drawing S-2527) and DT1420-{ ) (drawings S-2760 and S-2907).
  • -3B threads per MIL-S-8879
    Metric threads per IS05855/1 and IS05855/2
  • Tooling type:
    "N" designates Counterbore
    "S" designates Countersink
  • Threads are cut for thread size codes: 8, 8D, 8F, M4. 10. IOC, 10F, M5, 12, 12C, 12F, AND M6.
  • Locking torque values of sizes 8, 8F, M4, 10, IOC, 10F, M5, 12, 12C, 12F, AND M6 are to satisfy SNECMA DT57-II.

    • 1 Nut element color code: (PCD 160147)
            None-Locking standard threads
            Green – Non-Locking standard threads
            Yellow - Coarse threads
            Orange - Fast lead threads
    • 2 Soft- dimension for Soft Aluminum Alloys & Plastics
    • 3 Hard - dimension for Hard Aluminum Alloys & Steel
    • 4 To obtain additional weights add increments of .010/100 per letter code for sizes 4, 4F, 6, 6F;